Automatic alternating-current contact apparatus.



c. E. L. BROWN. AUTOMATIC ALTERNATING CURRENT CONTACT APPARATUS.

APPLICATION FILED AUG. 27, 1906 Patented Apr. 13, 1909.

shaft 2 that is rotatively HTDSTATE entrant" oi i icii.

CHARLES EUGEN LANUELOT BROWN, OF BOEMERBURG, BADEN, SWITZERLAND.

AUTOMATIC ALTEBNATING-QURBENT CGNTACT APPARATUS.

Specification of Letters Patent.

Patented April 13, 1909.

Original application tiled November I, 1903, Serial'No. 180,201. Divided and this application filed August 27,

1906. Serial No. 332,178.

T all whom it may-concern:

Be it known thatv 1, CHARLES Evens LANGELOT BROW'N, a subject of the riing of Great Britain. residing at and whose postoflice address is lloeinerburg, Baden, Swit-.

zerland, have invented certain new and useful Improvements in Automatic Alter-nah in'g-Current Contact Apparatus; and I do hereby declare the following to be a full,

clear, and exact description of the invention,

such aswill enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompany ing drawings, and to letters o'r-iiguies' of ref erence marked thereon, which form a part of this specification. 1

The resent invention relates to an automatica y operating alternating current con tact apparatus designed. to operate an .electro magnetic circuitbreaker in the main circuit,-

being a division of my application Serial No. 180,201, filed November 7, 1903.

This device comprises an induction dcvir e which by reason of thereturii current is actuated to close a local circuit containing the electro magnetic ally operated switch.

In the accompanying drawings in which like parts are similarly designated, Figure 1,

is aside elevation. Fig.

ductive but non-magnetic material fixed on a mounted in a frame 3, and rotating between a plurality of laininated horse-shoemagnet corese whose poles as shown in Fig. 2, are but a slight'distmice froni'thc faces of th -disk. On the huninated iron cores 4 of which two are shown, are the energizing coils 5 inserted directly or indirectly through the medium of transformers iii-the tlPCtilCCll'tUlt to be controlled. A permanent magnet- 6 has its polcs'close to the disk and is for the purposeof daiupcning'the inoveinentsof the. disk and preventing its oscillation.

magnets 4- passes themuin current or it may be a current dependent on uu'd trunsl'oruuwl 2, is a front view" and Fig. 3, is a diagram illustrating; the oper-- ation of the device.

.- The apparatus-Icomprises a disk of confro n the main current and is depeudcr. u on the amperage while the coil -of the ot ier .magnet lies in a circuit in parall-ul across the main. circuit and is dependent on the v iltags in the line.

In Fig. 3, l have shown a diagram indirau ing the use of the instrument in connection with a three-phase line, in which 12 and 12 are suitable transformers, the primary of the former inserted in one of the three-phase line Wires and the primary of the latter connected across the other two line wires. An amineter 13-(A) is inserted in'the secondary circuit of the first named transformer with one of the coils 5. A voltmeter V is connected across the secondary circuit. of the other transformer 13 and in said circuit is the coil of the other electro1nagn(- t.

Both magnets l, 5 in conjunction exert a turning moment on the disk 1 in the same direction the value of which turning moment is dependent upon the strength of the working.

current in the line,but the direction in which the turning moment is exerted alters as soon as the working current is changed to a re verse current. The weight 8 carried by the cord 9 on drum 7 acts in. opposition to the normal turning moment exerted on the disk and the latter will beset in rotation as soon as the opposing turning moment exerted by the weight is'overcome by that exerted on the disk by the magnets and the cordwiih the weight will be wound up on the drum until' the pin l1 strikes the frame and prevents any further. rotation of the disk and windinc up of the cord as shown in Figs. 1 and 2. \Yhen a reverse current is set up in the line and when the turning moment exerted by the weight overcomes that exercised by the Plvtll'O-lllfifiliQtS, the disk will rotate in an opposite direction until pin ll'strikes the contact spring 10 whereupon the independent c rcuit 14, e5, 16, is closedto energize the clectroquac'nid 16 in said circuit to actuate the circuit brenl-zor l7 in the main circuit.

I claim,

l. The combination with an Ql(t'll'L)-1)l2tg not adapted to be included in one conductor of a three phase electric circuit, a second clectro-nmeuet adapted to be included between the other two conductors of the circuit, and a disk mounted to rotate between the poles of the magnets; of terminal contacts, and means operated by the disk to close said cmitacts when re erse current is passing in the main line, means to fix the minimum current at which the disk will rotate and means to regulate the time in are closed for the current selected.

2. The combination with two el'ectroeinagnets, one of which is adapted to be included ill-one of the conductors of a three phase electric circuit and the other between the rewhich the terminals time when the contacts will be closed after lthe actuating current begins to drive the disk, and a weight or weights attached to said suspension that determine the current necessary to rotate the disk.

In testimony that 1 claim the foregoing as a my invention, 1 have signed my name in presence of two subscribing witnesses.

maining two conductors of said circuit and a disk mounted to rotate between the magnets; of terminal contacts a adapted to be wound up by said disk, the length ofwhich suspension determines the flexible suspension CHARLES EUGEN LANCELUT BROWN.

itne'sses: ALBERT ERNEST STOLL,

HERMANN 'EIOHLER. 

